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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/active_tab_permission_granter.h"
#include "chrome/browser/extensions/active_script_controller.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "extensions/browser/extension_registry.h"
#include "extensions/common/extension_messages.h"
#include "extensions/common/feature_switch.h"
#include "extensions/common/permissions/permission_set.h"
#include "extensions/common/permissions/permissions_data.h"
#include "extensions/common/user_script.h"
#include "url/gurl.h"
using content::RenderProcessHost;
using content::WebContentsObserver;
namespace extensions {
ActiveTabPermissionGranter::ActiveTabPermissionGranter(
content::WebContents* web_contents,
int tab_id,
Profile* profile)
: WebContentsObserver(web_contents),
tab_id_(tab_id),
extension_registry_observer_(this) {
extension_registry_observer_.Add(ExtensionRegistry::Get(profile));
}
ActiveTabPermissionGranter::~ActiveTabPermissionGranter() {}
void ActiveTabPermissionGranter::GrantIfRequested(const Extension* extension) {
if (granted_extensions_.Contains(extension->id()))
return;
APIPermissionSet new_apis;
URLPatternSet new_hosts;
const PermissionsData* permissions_data = extension->permissions_data();
// If the extension requested all-hosts but has had it withheld, we grant it
// active tab-style permissions, even if it doesn't have the activeTab
// permission in the manifest.
if (permissions_data->HasAPIPermission(APIPermission::kActiveTab) ||
permissions_data->HasWithheldImpliedAllHosts()) {
new_hosts.AddOrigin(UserScript::ValidUserScriptSchemes(),
web_contents()->GetVisibleURL().GetOrigin());
new_apis.insert(APIPermission::kTab);
}
if (permissions_data->HasAPIPermission(APIPermission::kTabCapture))
new_apis.insert(APIPermission::kTabCaptureForTab);
if (!new_apis.empty() || !new_hosts.is_empty()) {
granted_extensions_.Insert(extension);
scoped_refptr<const PermissionSet> new_permissions =
new PermissionSet(new_apis, ManifestPermissionSet(),
new_hosts, URLPatternSet());
permissions_data->UpdateTabSpecificPermissions(tab_id_, new_permissions);
const content::NavigationEntry* navigation_entry =
web_contents()->GetController().GetVisibleEntry();
if (navigation_entry) {
content::RenderViewHost* render_view_host =
web_contents()->GetRenderViewHost();
render_view_host->Send(new ExtensionMsg_UpdateTabSpecificPermissions(
render_view_host->GetRoutingID(),
navigation_entry->GetURL(),
extension->id(),
new_hosts));
// If more things ever need to know about this, we should consider making
// an observer class.
// It's important that this comes after the IPC is sent to the renderer,
// so that any tasks executing in the renderer occur after it has the
// updated permissions.
ActiveScriptController::GetForWebContents(web_contents())
->OnActiveTabPermissionGranted(extension);
}
}
}
void ActiveTabPermissionGranter::DidNavigateMainFrame(
const content::LoadCommittedDetails& details,
const content::FrameNavigateParams& params) {
if (details.is_in_page)
return;
DCHECK(details.is_main_frame); // important: sub-frames don't get granted!
// Only clear the granted permissions for cross-origin navigations.
//
// See http://crbug.com/404243 for why. Currently we only differentiate
// between same-origin and cross-origin navigations when the
// script-require-action flag is on. It's not clear it's good for general
// activeTab consumption (we likely need to build some UI around it first).
// However, the scripts-require-action feature is all-but unusable without
// this behaviour.
if (FeatureSwitch::scripts_require_action()->IsEnabled()) {
const content::NavigationEntry* navigation_entry =
web_contents()->GetController().GetVisibleEntry();
if (!navigation_entry || (navigation_entry->GetURL().GetOrigin() !=
details.previous_url.GetOrigin())) {
ClearActiveExtensionsAndNotify();
}
} else {
ClearActiveExtensionsAndNotify();
}
}
void ActiveTabPermissionGranter::WebContentsDestroyed() {
ClearActiveExtensionsAndNotify();
}
void ActiveTabPermissionGranter::OnExtensionUnloaded(
content::BrowserContext* browser_context,
const Extension* extension,
UnloadedExtensionInfo::Reason reason) {
// Note: don't need to clear the permissions (nor tell the renderer about it)
// because it's being unloaded anyway.
granted_extensions_.Remove(extension->id());
}
void ActiveTabPermissionGranter::ClearActiveExtensionsAndNotify() {
if (granted_extensions_.is_empty())
return;
std::vector<std::string> extension_ids;
for (ExtensionSet::const_iterator it = granted_extensions_.begin();
it != granted_extensions_.end(); ++it) {
it->get()->permissions_data()->ClearTabSpecificPermissions(tab_id_);
extension_ids.push_back((*it)->id());
}
content::RenderViewHost* render_view_host =
web_contents()->GetRenderViewHost();
render_view_host->Send(new ExtensionMsg_ClearTabSpecificPermissions(
render_view_host->GetRoutingID(), extension_ids));
granted_extensions_.Clear();
}
} // namespace extensions
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